photoreactivationn.

Brit.

/ˌfəʊtəʊrɪˌaktᵻˈveɪʃn/, U.S.

/ˈˌfoʊdoʊriˌæktəˈveɪʃ(ə)n/

Origin: Formed within English, by compounding. Etymons: photo- comb. form, reactivation n. at reactivate v. Derivatives.

Etymology: < photo- comb. form + reactivation n. at reactivate v. Derivatives

Biology.

The phenomenon whereby exposure of living material to visible light can counteract damage to genetic material caused by previous ultraviolet irradiation; an instance of this. Cf. photorecovery n., photorepair n.

ΘΚΠ

the world > life > biology > biological processes > light-related processes > [noun] > other processes

photoassimilation1922

photoinactivation1938

photoact1940

photoreactivation1949

photoaction1951

photoreversal1951

photoreactivability1952

photoreversibility1954

photoprotection1958

photorepair1967

1949 A. Kelner in Jrnl. Bacteriol. 58 511 The effect of reactivating light will be referred to in this paper as photoreactivation. [Note] The use of this term was suggested by Dr. Max Delbrück.

1966 Adv. Radiation Biol. 2 21 These photoreactivations may result from DNA inactivations repairable by the mechanisms already described here.

1992 Economist 7 Mar. 113/2 If the UV-B gets through the sun-screen, various mechanisms can still repair the damage done to DNA. One such mechanism, photoreactivation, uses energy from UV-A to activate a protein called photolyase which can then unpick knots in a damaged strand of DNA.

This entry has been updated (OED Third Edition, March 2006; most recently modified version published online March 2022).

单词	photoreactivation
释义	photoreactivationn. Brit. /ˌfəʊtəʊrɪˌaktᵻˈveɪʃn/, U.S. /ˈˌfoʊdoʊriˌæktəˈveɪʃ(ə)n/ Origin: Formed within English, by compounding. Etymons: photo- comb. form, reactivation n. at reactivate v. Derivatives. Etymology: < photo- comb. form + reactivation n. at reactivate v. Derivatives Biology. The phenomenon whereby exposure of living material to visible light can counteract damage to genetic material caused by previous ultraviolet irradiation; an instance of this. Cf. photorecovery n., photorepair n. ΘΚΠ the world > life > biology > biological processes > light-related processes > [noun] > other processes photoassimilation1922 photoinactivation1938 photoact1940 photoreactivation1949 photoaction1951 photoreversal1951 photoreactivability1952 photoreversibility1954 photoprotection1958 photorepair1967 1949 A. Kelner in Jrnl. Bacteriol. 58 511 The effect of reactivating light will be referred to in this paper as photoreactivation. [Note] The use of this term was suggested by Dr. Max Delbrück. 1966 Adv. Radiation Biol. 2 21 These photoreactivations may result from DNA inactivations repairable by the mechanisms already described here. 1992 Economist 7 Mar. 113/2 If the UV-B gets through the sun-screen, various mechanisms can still repair the damage done to DNA. One such mechanism, photoreactivation, uses energy from UV-A to activate a protein called photolyase which can then unpick knots in a damaged strand of DNA. This entry has been updated (OED Third Edition, March 2006; most recently modified version published online March 2022). < n.1949
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